Solis, 64, lives on the banks of Mexico's Villa Victoria reservoir, which supplies water to the bustling capital hours away but does not reach her own faucets. Villa Victoria is part of the Cutzamala System, the source of water for about six million people in Mexico City and the surrounding state of Mexico. Climate change, chaotic urban growth and inefficient infrastructure have strained Mexico's water supplies, pushing the Cutzamala System's stores to their lowest level in 27 years. Mexico City is also tapping alternative sources of water outside the Cutzamala System, including by replacing wells in the Zumpango area in the state of Mexico. But for people like Israel, who lives just a few minutes' drive from the Cutzamala System's water treatment plant and asked not to use his last name, the constitution's promise is increasingly distant.

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